Gray. Also, I forgot to mention lights 4 (firmware status) and 1 (vehicle interface status) are lit solid red and light 2 (USB com status) blinks blue.

I followed the instructions and the install seemed to go smoothly, but the unit isn't being recognized by the software. When I plug it into the computer, Device manager shows it as "USB Serial Port (COM14), but the VIDA drop-down "Communicatoins tool" box only shows "Not selected...

It's been a long saga trying to get my '04 XC90 back in operation. I was having seemingly random electrical failures. When I heated the CEM with a heat gun (on low), all would work - for a little while. I sent the CEM to Total Auto Tech in San Jose, who transferred everything to an '03 CEM. I got it...

Oh great - just the answers I was hoping I wouldn't get. So, how do I determine if the problem is the DIM and/or the CEM?

I hate electrical problems. My 2004 XC90 was working fine when I turned off the ignition switch. When I turned it back on, the instrument cluster was dark, all the instruments were at zero (speedo, tach, temp, gas, etc.), turn signals weren't working, backup lights were out, power locks wouldn't loc...